#![allow(unused_variables)]
fn main() {
    use std::collections::VecDeque;
    let deque: VecDeque<_> = [1, 2, 3].into();
    let range = deque.range(2..).copied().collect::<VecDeque<_>>();
    assert_eq!(range, [3]);
    let all = deque.range(..);
    assert_eq!(all.len(), 3);
}